HID: hid-steam: Add Deck IMU support

[ Upstream commit 3347e165 ]

The Deck's controller features an accelerometer and gyroscope which
send their measurement values by default in the main HID input report.
Expose both sensors to userspace through a separate evdev node as it
is done by the hid-nintendo and hid-playstation drivers.

Signed-off-by: Max Maisel <mmm-1@posteo.net>
Reviewed-by: Vicki Pfau <vi@endrift.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Stable-dep-of: 79504249 ("HID: hid-steam: Move hidraw input (un)registering to work")
Signed-off-by: Sasha Levin <sashal@kernel.org>